Add shared report format flag

reporter.go

@@ -134,6 +134,7 @@ func (r *Reporter) applySelection(selection commandmeta.ReportingSelection) {
 	}
 	state.progress = selection.Progress
 	state.progressSet = selection.ProgressSet
+	state.format = Format(selection.Format)
 }
 
 // Output returns a managed writer for substantive command results. Writes are